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<title>Problem 2425. -- [HAOI2010]计数 -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>2425: [HAOI2010]计数</h2><span class=green>Time Limit: </span>10 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>128 MB<br><span class=green>Submit: </span>27&nbsp;&nbsp;<span class=green>Solved: </span>15<br>[<a href='submitpage.php?id=2425'>Submit</a>][<a href='problemstatus.php?id=2425'>Status</a>][<a href='bbs.php?id=2425'>Discuss</a>]</center><h2>Description</h2><div class=content><p class="MsoNormal" style="text-indent:21.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="RU">你有一组非零数字（不一定唯一），你可以在其中插入任意个0，这样就可以产生无限个数。比如说给定{1,2},那么可以生成数字12,21,102,120,201,210,1002,1020,等等。<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-indent:21.0pt"><b style="mso-bidi-font-weight:
normal"><span lang="RU">现在给定一个数，问在这个数之前有多少个数。（注意这个数不会有前导0）.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b style="mso-bidi-font-weight:normal"><span lang="RU"><o:p>&nbsp;</o:p></span></b></p>
<p></p></div><h2>Input</h2><div class=content><p class="MsoNormal" style="text-indent:17.7pt;mso-char-indent-count:1.47"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;mso-fareast-language:
ZH-CN">只有</span></b><b style="mso-bidi-font-weight:normal"><span lang="RU" style="mso-fareast-font-family:宋体;mso-fareast-language:ZH-CN">1</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;mso-fareast-language:
ZH-CN">行，为</span></b><b style="mso-bidi-font-weight:normal"><span lang="RU" style="mso-fareast-font-family:宋体;mso-fareast-language:ZH-CN">1</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;mso-fareast-language:
ZH-CN">个整数</span><span lang="RU">n.<o:p></o:p></span></b></p>
<p class="MsoNormal"><b style="mso-bidi-font-weight:normal"><span lang="RU"><o:p>&nbsp;</o:p></span></b></p>
<p></p></div><h2>Output</h2><div class=content><p class="MsoNormal"><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;mso-fareast-language:ZH-CN">只有</span><span lang="RU">整数</span></b><b style="mso-bidi-font-weight:normal"><span style="font-family:宋体;mso-ascii-font-family:
&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;mso-fareast-language:
ZH-CN">，</span><span lang="RU">表示</span></b><b style="mso-bidi-font-weight:normal"><span lang="RU" style="mso-fareast-font-family:宋体;mso-fareast-language:ZH-CN">N</span><span lang="RU">之前出现的数的个数。<o:p></o:p></span></b></p>
<p></p></div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>1020</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>7</span></div><h2>HINT</h2>
			<div class=content><p><p class="MsoNormal"><b style="mso-bidi-font-weight:normal"><span lang="RU">n的长度不超过50，答案不超过2<sup>63</sup>-1.<o:p></o:p></span></b></p><br />
<p></p></p></div><h2>Source</h2>
			<div class=content><p><a href='problemset.html?search=Day2'>Day2</a></p></div><center>[<a href='submitpage.php?id=2425'>Submit</a>][<a href='problemstatus.php?id=2425'>Status</a>][<a href='bbs.php?id=2425'>Discuss</a>]</center>﻿<br>

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